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To better understand disablement and transitions from impairment to disability, discrete valid measures of functional limitation are needed. This study reports the development and criterion-related validity of scales that quantify severity of upper and lower extremity functional limitation.

the journals of gerontology. series b, psychological sciences and social sciences

Severity of Upper and Lower Extremity Functional Limitation: Scale Development and Validation With Self-Report and Performance-Based Measures of Physical Function